firing pin safety

It is a spring loaded nub that fits into a slot in the firing pin and prevents the forward movement of the firing pin unless the trigger is fully pulled back. This prevents an accidental discharge even if the loaded and cocked pistol is dropped on a hard surface. It is passive in the sense that there is no other manipulation that is needed to disengage it aside from pulling the trigger.

Fwiw, I have tried both and really can not tell if there is actually any difference, I suppose I have not yet reached the level where I can feel these subtle changes. It does add more moving parts to an already complicated machine.